On Wed, 4 May 2022 15:02:43 GMT, liach <d...@openjdk.java.net> wrote:

>> test/jdk/java/util/IdentityHashMap/Basic.java line 500:
>>> 498:         Box newKey = new Box(k1a);
>>> 499:         Box newVal = new Box(v1a);
>>> 500:         Box r = map.computeIfAbsent(newKey, k -> { called[0] = true; 
>>> return newVal; });
>> More of a curiosity than a review comment - I see that various places in 
>> this PR use a boolean array with one element instead of just a boolean type. 
>> Is that a personal coding preference or is there something more to it?
> This just serves as a modifiable boolean like an AtomicBoolean. Remember 
> lambdas can only use final local var references (due to how they work), and 
> it cannot access or modify the local variable in the caller method.

Yes, that's it; you can't mutate a local variable captured by a lambda.


PR: https://git.openjdk.java.net/jdk/pull/8354

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